<template>
  <view>
    <view class="goods-list">
      <view v-for="(goods,i) in goodslist" :key="i" @click="gotoDetail(goods)">
        <my-goods :goods="goods"></my-goods>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        //请求参数对象
        queryObj:{
          //查询关键词
          query:'',
          //商品分类id 
          cid:'',
          //页码值
          pagenum:1,
          //每页显示多少条数据
          pagesize:10
        },
        //商品列表的数据
        goodslist:[],
        //总数量  用来实现分页
        total:0,
        //节流阀
       isloading : false
      };
    },
    
    onLoad(options){
      this.queryObj.query = options.query || ''
      this.queryObj.cid = options.cid || ''
      /* console.log(this.queryObj) */
      this.getGoodsList()
    },
    
    methods:{
      
      async getGoodsList(cb){
        //打开 节流阀
        this.isloading=true
       const  {data:res} = await uni.$http.get('/api/public/v1/goods/search',this.queryObj)
        //关闭 节流阀
        this.isloading = false
        //只要数据请求完毕 就回调cb函数 
        cb && cb()
       if(res.meta.status!==200) return uni.$showMsg()
       //赋值 上拉时新旧数据拼接
       this.goodslist = [...this.goodslist,...res.message.goods]
       this.total = res.message.total
      },
      //跳转到商品的详情页面
      gotoDetail(goods){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + goods.goods_id
        })
      }
      
    },
    
    //上拉时 加载更多
    onReachBottom(){
      //判断数据是否加载完毕
      if(this.queryObj.pagenum*this.queryObj.pagesize>=this.total) return uni.$showMsg('数据加载完毕')
      //节流阀
      if(this.isloading )  return 
      //让页码值自增 加1
      this.queryObj.pagenum++
      this.getGoodsList()
    },
    
    //下拉刷新事件
    onPullDownRefresh(){
      //1 重置关键数据
      this.queryObj.pagenum = 1
      this.total = 0
      this.isloading = false
      this.goodslist = []
      //2  重新发起请求 并传入回调函数关闭刷新
      this.getGoodsList(()=>uni.stopPullDownRefresh())
    }
    
  }
</script>

<style lang="scss">

</style>
